A presente dissertação é uma reflexão sobre como o sociólogo pernambucano Gilberto Freyre (1900-1987) construiu o conceito de região Nordeste através de práticas culturais de herança escrava africana, dentro do que o autor chama de miscigenação equilibrada. Utilizou-se um corpus de quatro obras: Nordeste (1937), Manifesto regionalista (1952), Região e tradição (1968b) e Casa-grande &senzala (2006). Para isso, através de uma metodologia interpretativa, buscou-se analisar as influências das correntes deterministas da Europa do século XIX em intelectuais brasileiros que antecederam Freyre nas discussões raciais do Brasil. Eles são Franklin Távora, Silvio Romero e Raimundo Nina Rodrigues. Da mesma forma, tentou-se compreender os alcances das ideias do professor alemão Franz Boas no sociólogo. Empregou-se também a metodologia empírica de análise histórico documental, por meio de seleção de documentos históricos referentes ao Movimento Regionalista Nordestino e aos quatro Congressos Afro-Brasileiros do Nordeste. Os respectivos documentos foram encontrados nas Fundações Gilberto Freyre e Joaquim Nabuco, na cidade de Recife, em Pernambuco. Esta pesquisa abarca conceitos como região, regionalismo, cultura e raça, e, por isso, procuraram-se aportes teóricos em cientistas sociais, antropólogos, históricos e críticos literários. Dentre eles, apontam-se Pierre Bourdieu (2003), Norbert Elias (1994), Franz Boas (2005), Durval Muniz de Albuquerque Júnior (2011), José Aderaldo Castelo (1961), Neoraldo Pontes de Azevêdo (1984), Lilia Moritz Schwarcz (1993), Renato Ortiz (1985), Roberto Ventura (1991), entre outros. / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES. / This research analyzes how Brazilian Sociologist Gilberto Freyre(1900-1987) defines the concept of Brazilian Northeast through cultural practices of the African slave inheritage, considering a concept he created, balanced miscegenation. The research corpus consists in four publications: Nordeste (1937), Manifesto regionalista (1952),Região e tradição (1968b) and Casa-grande & senzala (2006). By applying hermeneutic methodology, the influences of deterministic currents of the nineteenth century in Europe are compared to the productions of Brazilian intellectuals, which led Freyre to focus on racial discussions in Brazil. These intellectuals are Franklin Távora, Silvio Romero and Raimundo Nina Rodrigues. Similarly the scope of the German teacher Franz Boas are considered as influences for Freyre’s productions. The empirical methodology of documentary historical analysis is also applied, by selecting historical documents related to the Regionalist Movement of Brazilian Northeast and the four African-Brazilian Northeast Congresses. The relevant documents were found in the Gilberto Freyre and Joaquim Nabuco foundations, in Recife – Pernambuco, Brazil. This research includes concepts such as region, regionalism, culture and race, and therefore uses theoretical contributions from Social Scientists, Anthropologists, Historians and Literary Critics. Amongthem are Pierre Bourdieu (2003), Norbert Elias (1994), Franz Boas (2005), Durval Muniz de Albuquerque Júnior (2011), José Aderaldo Castelo (1961), Neoraldo Pontes de Azevêdo (1984), Lilia Moritz Schwarcz (1993), Renato Ortiz (1985), Roberto Ventura (1991), and others.

Clearing of trees from the so-called caatinga woodland that characterizes the vegetation of the semi-arid region of northeast Brazil offers possibilities for increasing forage production. This research analyzed the first-year effects of clearing caatinga on dry season forage for goats and sheep. In addition, factors affecting litter decomposition on cleared and uncleared caatinga were assessed to evaluate the viability of deferring grazing of forages during the wet season for use later in the dry season. Removing the trees resulted in a sixfold increase in production of herbaceous vegetation, however, 88 percent of the increased yield on the cleared areas was in the form of stems from herbaceous vegetation. Seventy-two percent of the stems were unpalatable to goats and sheep because of the massive size of those stems. Leaf litter from trees was an important component of the diets of goats and sheep during the dry season and clearing reduced production of this forage threefold. Clearing resulted in increased decomposition of leaf litter. Changes in microclimate played only a minor role in this difference. The reduction in the amount of leaf litter from trees relative to litter from herbs had the greatest effect on decomposition rates of dry season forage because tree litter decomposed less rapidly than did herbaceous litter. The slow decomposition of leaf litter during the dry season suggests that deferment. of cleared or uncleared caatinga for use as forage in the latter part of the dry season is feasible. An analysis of the diets of esophageally fistulated goats and sheep indicated that clearing may be a viable alternative for improving the amount and the in vitro dry matter digestibility of the forage consumed during the dry season the first-year post-treatment. These increases were attributed to an absolute greater abundance of preferred herbaceous forages (i.e., foliage and leaf litter) and to the persistent green foliage on coppicing woody plants. Dietary nitrogen appeared to limit intake, and clearing did not improve availability of this nutrient to sheep and goats at the higher levels of grazing pressure applied in this study. Other ecosystem considerations such as watershed protection and long-term community stability must also be considered in decisions to remove the tree canopy of the caatinga.

O propósito deste estudo foi verificar a contribuição dos Distúrbios Ondulatórios de Leste (DOLs) na precipitação observada no período chuvoso (AMJJ) e avaliar previsões sazonais de chuva obtidas do RegCM3 (Regional Climate Model version 3) no Leste do Nordeste do Brasil (LNB). Para a identificação subjetiva dos DOLs foram utilizadas imagens de satélite no infravermelho e os campos de linhas de corrente e vorticidade relativa em 700 e 850 hPa da reanálise ERA-Interim, nos períodos chuvosos de 2006 a 2010. Cerca de 90% dos cavados observados em 700 hPa estiveram associados aos 116 DOLs que atingiram o LNB. Isto fornece média de 23 DOLs por ano com pequena variabilidade interanual. Foram construídas composições de variáveis meteorológicas desde 2 dias antes (-2) até 2 dias depois (+2) dos DOLs atingirem o LNB. A circulação apresentou anomalia ciclônica e confluente, vorticidade relativa ciclônica e convergência entre os dias -2 e 0 em baixos níveis, principalmente em 1000 hPa. Encontraram-se anomalias negativas de radiação de onda longa emergente (ROLE) e de omega e positivas de umidade relativa. A composição de precipitação indicou que são responsáveis por: 70% ou mais da chuva do período chuvoso do litoral norte de Alagoas (AL) ao leste do Rio Grande do Norte (RN), 60% entre a Zona da Mata de AL e o Agreste do RN, e 50% entre Sergipe e demais áreas do RN. Em média, os DOLs apresentaram período de 5,3 dias, comprimento de onda de 4307 km e velocidade de fase de 9,5 m s-1. O RegCM3 simulou a observada propagação para oeste dos cavados em 850-700 hPa, bem como a precipitação associada, para dois eventos de DOLs ocorridos entre 21-25 de maio de 2006. Em termos sazonais, o RegCM3 com a parametrização de Grell previu o padrão espacial da chuva similar à observada, mas superestimou-a. A detecção de DOLs utilizando diagramas do tipo Hovmöller identificou ~68% dos eventos obtidos subjetivamente. Aplicação de algoritmo de tracking utilizando ROLE ou vorticidade mostrou-se insatisfatória no rastreamento de DOLs, identificando, através de ROLE, ~55% dos eventos obtidos subjetivamente. / This study purpose was to verify the contribution of Easterly Wave Disturbances (EWDs) in the observed precipitation over the eastern part of Northeast Brazil (ENEB) during rainy season (AMJJ) and evaluate seasonal rainfall forecasts from RegCM3 (Regional Climate Model version 3). For the EWDs subjective identification it was used infrared satellite images and ERA-Interim reanalysis streamlines and relative vorticity fields at 700 and 850 hPa, at the rainy periods from 2006 to 2010. About 90% of the observed troughs at 700 hPa were associated with 116 EWDs that reached the ENEB. This provides a 23 EWDs average per year with small interannual variability. Meteorological variables compositions were constructed from 2 days before (-2) until 2 days after (+2) EWDs reached the ENEB. The circulation showed cyclonic and confluent anomaly, cyclonic relative vorticity and convergence between days -2 and 0 in low levels, mainly in 1000 hPa. Negative anomalies were found for outgoing longwave radiation (OLR) and omega whereas relative humidity presented positive anomaly. The precipitation composition indicated that the EWDs account for: 70% or more of rainy seasons precipitation from northern coast of Alagoas (AL) to the eastern Rio Grande do Nortes (RN), 60% from ALs Zona da Mata to the RNs Agreste, and 50% between Sergipe and the other RN areas. On average, the EWDs presented a 5.3 days period, a wavelength of 4307 km and phase velocity of 9.5 m s-1. The RegCM3 simulated the observed westward troughs propagation at the 850-700 hPa levels, and their associated precipitation as well, for two EWDs occurred between 21 and 25 May 2006. For seasonal simulations, the RegCM3 with Grell parameterization predicted the spatial pattern similar to the observed rain, but overestimated it. Approximately 68% of the events subjectively obtained EWDs were also identified using Hovmöller diagrams. The tracking algorithm using OLR or vorticity was unsatisfactory in the detection of EWDs, identifying with OLR ~55% of the events subjectively obtained.

FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / A RegiÃo Metropolitana de Fortaleza, no Estado do Cearà à composta por uma diversificada paisagem geomorfolÃgica, estruturada e modificada ao longo de milhÃes de anos durante a era geolÃgica. Entre as diversas morfologias, as formas originadas a partir do Ãltimo evento vulcÃnico ocorrido no Nordeste brasileiro hà 30 milhÃes merecem total apreÃo devido sua singularidade morfogenÃtica. Tais relevos tiveram suas gÃneses ligadas a partir da aÃÃo de um hot spot que ocorreu nesta Ãrea e juntos recebem o nome de FormaÃÃo Messejana. Esta formaÃÃo compÃe-se de uma dezena de pequenos relevos que se dispÃe em setores da margem continental ao longo da regiÃo metropolitana de Fortaleza. Dentre estes estÃo os relevos vulcÃnicos do Caruru, do Ancuri e PÃo-de-aÃÃcar. Esta pesquisa tem como objetivo: estabelecer a origem, estruturaÃÃo, caracterizaÃÃo morfolÃgica e ambiental destes relevos, assim como, definir as etapas da evoluÃÃo geomorfolÃgica da paisagem local. Para compreender tais objetivos buscamos se aprofundar na bibliografia sobre o assunto, interpretaÃÃo de material cartogrÃfico de diversas escalas, dados fÃsicos-ambientais com apoio de ferramentas de geoprocessamento e visitas a ÃrgÃos pÃblicos e a campo. Como resultados podemos concluir que os trÃs relevos da FormaÃÃo Messejana analisados neste trabalho apresentam-se em formas de Necks arredondados (Caruru e PÃo-de-AÃÃcar) e elipsoidal (Ancuri) e sÃo compostos por rochas alcalinas. Tais relevos se caracterizam por apresentarem extensÃes e altitudes bem diferentes, vertentes Ãngremes, solos poucos desenvolvidos e vegetaÃÃo de pequeno porte. Por fim, o Caruru, apresenta-se parcialmente destruÃdo devido à extraÃÃo das rochas para a construÃÃo civil, enquanto que no Ancuri esta atividade cessou hà aproximadamente sete anos. / The Metropolitan Area of Fortaleza, capital of the Cearà State, North-east Brazil, is composed by a diversified geomorphologic landscape, which has been structured and modified during geological times. Among this diversity, there are forms originated by the last volcanic event occurred in the Brazilian northeast, 30 millions ago, which create a very singular local morphology. Such prominences were probably originated by the action of a âhot spotâ. The magma extrusion resulting of this action created a geological domain named  Formation Messejana Â. This formation is composed by a set of ten volcanic reliefs, as small prominences disposed in many sectors of the city of Fortaleza coastal area and adjacencies. Among these prominences are the Caruru, Ancuri and PÃo de AÃucar hills. The present research has as objective to establish the origin, the processes of morphological structuration, the morphological characterization and the environmental situation of these volcanic prominences, as well as define the phases of morphological evolution of the local landscape. For this purpose, the following stages have been developed: bibliographical research about the matter, interpretation of cartographical data, with the use of diverse scales and thematic maps and cartographical geoprocessing techniques, and field work. As results, we are able to conclude that the three prominences of the Formation Messejana analyzed in this work present form of dome-like necks (Caruru and PÃo de AÃucar) and ellipsoidal form (Ancuri), being composed by alkaline rocks. Such prominences are characterized for presenting different extensions and altitudes, steep slopes, poorly developed soils and sparse vegetation cover. In the present moment, the Caruru hill is a place of mining activity, being partially destroyed due to the extraction of the rocks for the civil construction. This situation creates environmental problems, which may be extended to other volcanic hills, fact that put in danger of eradication these singular elements of the Cearà geomorphic landscape.

The global spread of the neoliberal paradigm has propelled a recent worldwide trend of educational decentralization/centralization policies. Such policies constitute a contradictory ensemble that has shifted authority and accountability across national, provincial or state, municipal, and school levels. They have also been marked by contestation over the extent to which curricula are nationally standardized or locally defined. Education reform in Brazil in this regard has been shaped by a confluence of neoliberal and critical theoretical currents: enhance the nation’s economic competitiveness in the global market and redress pressing societal issues. Using Basil Bernstein’s concepts of classification and framing together with critical educational scholars’ conceptualizations of knowledge and knowledge in the official and enacted curriculum as conceptual and theoretical frameworks, this comparative ethnographic case study examines the nexus between curriculum, knowledge, and pedagogy in municipal schools in Brazil’s Northeast. In doing so it addresses gaps in comparative educational research on curriculum knowledge along with how educational decentralization/centralization policies are implemented in practice. The central thesis is that municipal school curricula knowledge dynamics—the classification and framing of knowledge in the official curriculum and the relation of such with what knowledge is legitimized in classrooms, how such is transmitted and analyzed, and why—in Brazil’s Northeast encompass a multilevel web of contradictions. This web spans incongruent ideologies, opposing elements of autonomy and accountability, conflicting pedagogical principles and practices, and a chasm between curriculum ideals and urban periphery municipal school realities.

The global spread of the neoliberal paradigm has propelled a recent worldwide trend of educational decentralization/centralization policies. Such policies constitute a contradictory ensemble that has shifted authority and accountability across national, provincial or state, municipal, and school levels. They have also been marked by contestation over the extent to which curricula are nationally standardized or locally defined. Education reform in Brazil in this regard has been shaped by a confluence of neoliberal and critical theoretical currents: enhance the nation’s economic competitiveness in the global market and redress pressing societal issues. Using Basil Bernstein’s concepts of classification and framing together with critical educational scholars’ conceptualizations of knowledge and knowledge in the official and enacted curriculum as conceptual and theoretical frameworks, this comparative ethnographic case study examines the nexus between curriculum, knowledge, and pedagogy in municipal schools in Brazil’s Northeast. In doing so it addresses gaps in comparative educational research on curriculum knowledge along with how educational decentralization/centralization policies are implemented in practice. The central thesis is that municipal school curricula knowledge dynamics—the classification and framing of knowledge in the official curriculum and the relation of such with what knowledge is legitimized in classrooms, how such is transmitted and analyzed, and why—in Brazil’s Northeast encompass a multilevel web of contradictions. This web spans incongruent ideologies, opposing elements of autonomy and accountability, conflicting pedagogical principles and practices, and a chasm between curriculum ideals and urban periphery municipal school realities.

Made available in DSpace on 2016-08-12T19:18:28Z (GMT). No. of bitstreams: 1 DanielyFB_TESE.pdf: 1402093 bytes, checksum: 59bc334c392f5b839e6f8198798a7e22 (MD5) Previous issue date: 2014-12-16 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Knowledge of the factors related to the dynamics of herbicides in the environment is of fundamental importance to predict the behavior of herbicides in different soil types and selection of appropriate doses and to avoid harmful effects to the environment and subsequent crops. Three experiments were conducted in order to analyze the dynamics of sulfentrazone in five soils of sugarcane areas of the Brazilian Northeast: Quartzipsamment (Peter Old-RN), Cambisol (Quixeré-CE); Oxisol (Coastal Plains - Maceió-AL), Red-Yellow Ultisol (Coastal Plains - Maceió-AL) and an Epiaquic Haplustult (floodplain - Maceió-AL). The first experiment aimed to characterize chemically, physically and mineralogically the topsoil of different soil classes. The characterization of soil attributes allowed to observe that areas with cane sugar cultivation vary depending mainly physical attributes, with soils of different textural classes and chemical attributes, highlighted with total Organic Carbon content and P available. Regarding the mineralogy, it was observed that the sugarcane areas are installed from young soils with predominance of 2: 1 clay soils to more developed with the presence of kaolinite, gibbsite and iron oxides. The second experiment aimed to evaluate the sorption and desorption of sulfentrazone in the five soils mentioned above was conducted in laboratory conditions. Freundlich equation was adjusted to obtain the sorption coefficients, Kf (sorption capacity) and 1 / n (intensity sorption). It was observed that the soils have different behavior in relation to sulfentrazone sorption potential. Based on the results of this second study, we concluded that the increasing order of sorption was: Argisol (Kf = 8.74)> Oxisol (Kf = 8.23)> Quartzipsamment (Kf = 7.50)> Inceptisol (Kf = 6 98)> Gleysol (Kf = 6.67); while desorption decreased in the following order: Argisol <Gleysol <Quartzipsamment <Inceptisol <Oxisol. The third study aimed to evaluate the leaching of sulfentrazone in these soils through bioassay and liquid chromatography high resolution. Based on the results, it is concluded that the mobility of sulfentrazone in the soil is influenced by its chemical, physical and mineralogical, presenting the following leaching potential sequence: Quartzipsamment (45 cm)> Oxisol (35 cm)> Argisol (20 cm) = Inceptisol (20 cm) = Gleysol (20 cm). Before making the recommendation of sulfentrazone, we must know the chemical, physical and mineralogical characteristics of soils and their interactions with the herbicide, in order to ensure technical efficiency and environmental sustainability / O conhecimento dos fatores relacionados à dinâmica de herbicidas no ambiente é de fundamental importância para prever o comportamento de herbicidas nas diferentes classes de solo e para seleção de dosagens adequadas, bem como para evitar efeitos prejudiciais ao ambiente e às culturas subsequentes. Foram conduzidos três experimentos, visando a analisar a dinâmica do herbicida sulfentrazone em cinco solos de regiões canavieiras do Nordeste brasileiro: Neossolo Quartzarênico (Pedro Velho-RN), Cambissolo Háplico (Quixeré-CE); Latossolo Vermelho-Amarelo (Tabuleiros Costeiros - Maceió-AL), Argissolo Vermelho-Amarelo (Tabuleiros Costeiros - Maceió-AL) e um Gleissolo Háplico (várzea - Maceió-AL). O primeiro experimento objetivou caracterizar química, física e mineralogicamente a camada arável de diferentes classes de solos. A caracterização dos atributos dos solos permitiu observar que as áreas com cultivo de cana-de-açúcar variam em função principalmente dos atributos físicos, com solos de diferentes classes texturais e atributos químicos, tendo destaque o teor de Carbono Orgânico total e P disponível. Em relação à mineralogia, foi possível observar que as áreas canavieiras são instaladas desde solos jovens com predomínio de argilominerais 2:1 até solos mais desenvolvidos com presença de caulinitas, gibsita e óxidos de ferro. O segundo experimento, com objetivo de avaliar a sorção e a dessorção do sulfentrazone nos cinco solos anteriormente mencionados foi conduzido em condições de laboratório. Foram ajustadas equações de Freundlich para obtenção dos coeficientes de sorção, Kf (capacidade de sorção) e 1/n (intensidade de sorção). Observou-se que os solos estudados apresentam comportamento diferenciado em relação ao potencial de sorção do sulfentrazone. Com base nos resultados deste segundo trabalho, conclui-se que a ordem crescente de sorção foi: Argissolo (Kf = 8,74) > Latossolo (Kf = 8,23) > Neossolo Quartzarênico (Kf = 7,50) > Cambissolo (Kf = 6,98) > Gleissolo (Kf = 6,67); ao passo que a dessorção decresceu na seguinte ordem: Argissolo < Gleissolo < Neossolo Quartzarênico < Cambissolo < Latossolo. O terceiro trabalho propôs avaliar a lixiviação do herbicida sulfentrazone nos referidos solos por meio de bioensaios e cromatografia líquida de alta resolução. Baseado nos resultados, conclui-se que a mobilidade do sulfentrazone nos solos é influenciada pelas suas características químicas, físicas e mineralógicas, apresentando a seguinte sequência de potencial de lixiviação: Neossolo Quartzarênico (45 cm) > Latossolo (35 cm) > Argissolo (20 cm) = Cambissolo (20 cm) = Gleissolo (20 cm). Antes de fazer recomendação do sulfentrazone, é necessário conhecer as características químicas, físicas e mineralógicas dos solos e suas interações com o herbicida, no intuito de garantir eficiência técnica e sustentabilidade ambiental

Made available in DSpace on 2016-08-15T20:31:32Z (GMT). No. of bitstreams: 1 RodolfoGV_DISSERT.pdf: 1093559 bytes, checksum: ab9bf9b53ab3a3bbbaa384e5660f820f (MD5) Previous issue date: 2015-07-31 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Creation of goats has an important socio-economic role in the Northeast, concentrating more than 90% of the national herd. This limited activity in this region is for the seasonal rainy period short and low rainfall intensity; restricting the forage supply along the year and favoring the appearance of deficiency and metabolic diseases. This fact stresses the need for seasonality effects of study on energy and protein profile goats extensively created any semiarid Rio Grande do Norte. Were used 20 goats without defined standard racial, male, neutered, healthy, kept two properties, separated into two groups of 10 animals, during 12 months. The blood was collected monthly paragraph rating protein (total protein, albumin and urea) and energy (betahydroxybutyrate, fatty acids esterified not, glucose and cholesterol). Following the reference values literature consulted none of the above variables showed superior values. Among variables such as protein albumin, a protein total, urea values critics had no definite dry period. In the energy assessment, during the rainy season, glucose and cholesterol values showed minor, while the beta-hydroxybutyrate and esterified fatty acids presented no more values indicating the energy deficit especially in this season of the year. That way we can infer the need for energy supplementation no rainy period and protein do not definite dry period, paragraph goats extensive created a non semiarid Northeast / A criação de caprinos tem um importante papel socioeconômico na região Nordeste, concentrando a maior parte do rebanho nacional. Esta atividade está limitada nessa região pela sazonalidade do período chuvoso curto e de baixa intensidade pluviométrica; restringindo o suprimento forrageiro ao longo do ano e favorecendo o aparecimento de doenças carenciais e metabólicas. Esse fato releva a necessidade do estudo dos efeitos da sazonalidade sobre o perfil energético e proteico de caprinos criados extensivamente no semiárido do Rio Grande do Norte. Foram utilizados 20 caprinos sem padrão racial definido, machos, castrados, hígidos, mantidos em duas propriedades, sendo 10 animais em cada, durante 12 meses. O sangue foi coletado mensalmente para avaliação proteica (proteína total, albumina e ureia) e energética (beta-hidroxibutirato, ácidos graxos não esterificados, glicose e colesterol). Dentre as variáveis proteicas: albumina, ureia e proteína total apresentaram déficit tanto no período chuvoso quanto no final do período seco. Já na avaliação energética: glicose e colesterol apresentaram valores menores, enquanto beta-hidroxibutirato e ácidos graxos não esterificados apresentaram valores maiores, indicando o déficit energético na época chuvosa. O perfil metabólico determinado mostrou a necessidade de suplementação energética e proteica no período chuvoso, e apenas de proteína no final do período seco para caprinos criados extensivamente no semiárido do Rio Grande do Norte

Made available in DSpace on 2016-08-31T13:19:24Z (GMT). No. of bitstreams: 1 JoelmaMD_DISSERT.pdf: 862662 bytes, checksum: 7edf456c310cb82bfea66a2ac576d349 (MD5) Previous issue date: 2015-03-27 / The L. ferrea is a plant in the Fabaceae family-Caesalpinoidae, commonly known jucá or ironwood is commonly found in the Caatinga of northeastern Brazil. The study investigated the germination response L. ferrea seeds in function of temperature and variation of osmotic potential.The research was conducted in the Biotechnology Laboratory at the Universidade Federal do Semi-Árido (UFERSA), Mossoró-RN. The work was divided into two experiments. In the first experiment was the curve of absorption of the seeds in different EC (Electrical Conductivity) 0 dSm-1 (control), 5dSm-1, 10 dSm-1, 15 dSm-1, 20 dSm-1 at constant temperatures of 15, 22, 27, 32 and 40°C. In the second experiment we observed the effects of osmotic potential (0, 5, 10, 15 and 20 dSm-1) and constant temperatures (15, 22, 27, 32, and 40°C), seed germination. The conclusion of this study that the EC influence the absorption of water by jucá seeds. At higher temperatures the absorption is faster, but with increased absorption EC decreases. The best germination was found at 27°C. The EC influenced seed germination, IVG and length of jucá seedlings as they increased the concentration of salts / A L. ferrea é uma planta da família Leguminosae-Caesalpinoidae, vulgarmente conhecida como jucá ou pau-ferro é comumente encontrada na Caatinga do nordeste brasileiro. O trabalho objetivou estudar a resposta germinativa de sementes de L. ferrea em função de temperaturas e variação do potencial osmótico. A pesquisa foi conduzida no Laboratório de Biotecnologia da Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró-RN. O trabalho foi dividido em dois experimentos. No primeiro experimento foi realizado a curva de absorção das sementes em condutividades elétricas (CE) distintas, de 0dSm-1 (testemunha), 5dSm-1, 10dSm-1, 15 dSm-1 e 20dSm-1 nas temperaturas constantes de 15, 22, 27, 32 e 40°C. No segundo experimento foi observado os efeitos do potencial osmótico (0, 5, 10 15 e 20dSm-1) e temperaturas constantes (15, 22, 27, 32, e 40), na germinação das sementes. Conclui-se com este trabalho que a CE influenciou na absorção de água pelas sementes de jucá. Em temperaturas mais elevadas a absorção é mais rápida, mas com o aumento da CE a absorção diminui. A melhor porcentagem de germinação foi encontrada na temperatura de 27°C. A CE influenciou na germinação, IVG e no comprimento das plântulas de jucá a medida que aumentou a concentração de sais

Submitted by Lucienne Costa (lucienneferreira@ufcg.edu.br) on 2018-08-27T14:18:56Z No. of bitstreams: 1 ROBERTA EVERLLYN PEREIRA RIBEIRO – DISSERTAÇÃO (PPGMET) 2017.pdf: 3094549 bytes, checksum: 6c430507e5f1b39f79836521e1326409 (MD5) / Made available in DSpace on 2018-08-27T14:18:56Z (GMT). No. of bitstreams: 1 ROBERTA EVERLLYN PEREIRA RIBEIRO – DISSERTAÇÃO (PPGMET) 2017.pdf: 3094549 bytes, checksum: 6c430507e5f1b39f79836521e1326409 (MD5) Previous issue date: 2015-02-26 / CNPq / As condições atmosféricas no Estado do Rio Grande do Norte em julho de 2011 foram investigadas através da Análise em Componentes Principais (ACP) e da Análise de Agrupamentos (AA) aplicadas a dados observacionais de ar superior. Totais diários de precipitação, imagens realçadas do satélite meteorológico GOES-12, e dados de reanálise também foram utilizados. Quatro eventos de chuva foram observados na primeira quinzena do mês. Um evento de precipitação intensa registrado no dia 16 em Natal totalizou 60,4 mm na cidade. No ambiente sinótico foi diagnosticado nos baixos níveis um cavado no leste do estado e área costeira próxima, associado a confluência nos baixos níveis e difluência nos altos níveis, e movimento ascendente em toda a troposfera, na véspera do evento. A ACP aplicada separadamente aos dados dos níveis de 1000, 850, 500 e 300 hPa resultou em um modelo com três componentes. O primeiro fator às 00 UTC está relacionado com a umidade, na baixa e média troposfera, e com a temperatura, na alta troposfera. Às 12 UTC, o primeiro fator tem relação com a temperatura em 1000 e 300 hPa, e com a umidade em 850 e 500 hPa. As séries temporais dos fatores das 12 UTC mostram aumento significativo da umidade na baixa troposfera, na véspera do evento. Na aplicação da AA aos fatores obtidos na ACP, os dias foram agrupados com base em características meteorológicas similares, para cada nível isobárico e horário sinótico. A aplicação da ACP e da AA a índices de estabilidade atmosférica agrupou os dias de acordo com a probabilidade de ocorrência de tempestades. Foram identificados sete grupos para cada horário sinótico: um grupo de difícil interpretação, quatro que agruparam dias com baixa probabilidade e sem registro de precipitação, na maioria dos dias, e dois que agruparam dias com probabilidade e registro de precipitação, na maioria dos dias. / The atmospheric conditions in the Rio Grande do Norte State on July 2011 were investigated by applying Principal Component Analysis (PCA) and Cluster Analysis (CA) to observational upper air data. Daily precipitation totals, enhanced GOES-12 satellite imagery and reanalysis data were also used. Four precipitation events were observed in the first half of the month. An intense rainfall event registered on day 16 in Natal accounted for a 60.4 mm daily total in the city. The synoptic ambient was characterized by a low level trough on coastal eastern Rio Grande do Norte and the nearby oceanic area, associated with low level convergence and upper level divergence, and upward motion throughout the troposphere, on the day before the event. The PCA applied separately to data of the 1000, 850, 500 and 300 hPa levels resulted in a three component model for the isobaric levels and synoptic times analyzed. The first factor at 00 UTC is related to moisture, in the low and middle troposphere, and temperature, in the upper troposphere. At 12 UTC the first factor is related to temperature at 1000 and 300 hPa, and moisture at 850 and 500 hPa. The 12 UTC factors time series show a significant increase in moisture in the low troposphere, on the day before the event. The CA applied to the factors obtained by means of PCA resulted in days grouped on the basis of similar meteorological characteristics, for each isobaric level and synoptic time. The application of PCA and CA to atmospheric stability indices grouped the days in accordance with the probability of storm occurrence: one group of difficult interpretation, four groups with low probability and no rainfall in the majority of the days, and two groups with probability and rainfall in the majority of the days.